D. Answer the following questions.
1. What is a skeleton?
2. What are the main functions of our skeleton?
3. How many bones are present in the rib cage?
4. Where is the jaw bone located?
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Answer:
1.The skeleton is the supporting framework of an organism.
2.The human skeleton performs six major functions;support,movement,protection,production of blood cells, storage if minerals,and endocrine regulation.
3.The rib cage consists of the 12 thoracic(chest)vertebrae,the 24 ribs,and the breast bone or sternum.
4.The jaw bone is located in mandible
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